Stable isotopes demonstrate intraspecific variation in habitat use and trophic level of non‐breeding albatrosses
International audience The non‐breeding period is critical for restoration of body condition and self‐maintenance in albatrosses, yet detailed information on diet and distribution during this stage of the annual cycle is lacking for many species. Here, we use stable isotope values of body feathers (...
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Online Access: | https://hal.archives-ouvertes.fr/hal-02931984 https://doi.org/10.1111/ibi.12874 |
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ftunivnantes:oai:HAL:hal-02931984v1 2023-05-15T13:44:26+02:00 Stable isotopes demonstrate intraspecific variation in habitat use and trophic level of non‐breeding albatrosses Mills, William Mcgill, Rona A.R. Cherel, Yves Votier, Stephen Phillips, Richard British Antarctic Survey NERC UK NERC Life Sciences Mass Spectrometry Facility Glasgow Scottish Universities Environmental Research Centre (SUERC) University of Glasgow-University of Edinburgh-University of Glasgow-University of Edinburgh-Natural Environment Research Council (NERC) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Environment and Sustainability Institute Penryn, UK University of Exeter Centre for Ecology and Conservation, Penryn Campus UK British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2021 https://hal.archives-ouvertes.fr/hal-02931984 https://doi.org/10.1111/ibi.12874 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/ibi.12874 hal-02931984 https://hal.archives-ouvertes.fr/hal-02931984 doi:10.1111/ibi.12874 ISSN: 0019-1019 EISSN: 1474-919X Ibis https://hal.archives-ouvertes.fr/hal-02931984 Ibis, 2021, 163, pp.463-472. ⟨10.1111/ibi.12874⟩ seabirds Thalassarche chrysostoma Procellariiformes intraspecific variation migration Southern Ocean [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.1111/ibi.12874 2023-01-03T23:59:33Z International audience The non‐breeding period is critical for restoration of body condition and self‐maintenance in albatrosses, yet detailed information on diet and distribution during this stage of the annual cycle is lacking for many species. Here, we use stable isotope values of body feathers (δ13C, δ15N) to infer habitat use and trophic level of non‐breeding adult Grey‐headed Albatrosses Thalassarche chrysostoma (n = 194) from South Georgia. Specifically, we: (i) investigate intrinsic drivers (sex, age, previous breeding outcome) of variation in habitat use and trophic level; (ii) quantify variation among feathers of the same birds; and (iii) examine potential carry‐over effects of habitat use and trophic level during the non‐breeding period on subsequent breeding outcome. In agreement with previous tracking studies, δ13C values of individual feathers indicate that non‐breeding Grey‐headed Albatrosses from South Georgia foraged across a range of oceanic habitats, but mostly in subantarctic waters, between the Antarctic Polar Front and Subtropical Front. Sex differences were subtle but statistically significant, and overlap in the core isotopic niche areas was high (62%); however, males exhibited slightly lower δ13C and higher δ15N values than females, indicating that males forage at higher latitudes and at a higher trophic level. Neither age nor previous breeding outcome influenced stable isotope values, and we found no evidence of carry‐over effects of non‐breeding habitat use or trophic level on subsequent breeding outcome. Repeatability among feathers of the same individual was moderate in δ13C and low in δ15N. This cross‐sectional study demonstrates high variability in the foraging and migration strategies of this albatross population. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Université de Nantes: HAL-UNIV-NANTES Antarctic Southern Ocean The Antarctic Ibis 163 2 463 472 |
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Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
seabirds Thalassarche chrysostoma Procellariiformes intraspecific variation migration Southern Ocean [SDE]Environmental Sciences |
spellingShingle |
seabirds Thalassarche chrysostoma Procellariiformes intraspecific variation migration Southern Ocean [SDE]Environmental Sciences Mills, William Mcgill, Rona A.R. Cherel, Yves Votier, Stephen Phillips, Richard Stable isotopes demonstrate intraspecific variation in habitat use and trophic level of non‐breeding albatrosses |
topic_facet |
seabirds Thalassarche chrysostoma Procellariiformes intraspecific variation migration Southern Ocean [SDE]Environmental Sciences |
description |
International audience The non‐breeding period is critical for restoration of body condition and self‐maintenance in albatrosses, yet detailed information on diet and distribution during this stage of the annual cycle is lacking for many species. Here, we use stable isotope values of body feathers (δ13C, δ15N) to infer habitat use and trophic level of non‐breeding adult Grey‐headed Albatrosses Thalassarche chrysostoma (n = 194) from South Georgia. Specifically, we: (i) investigate intrinsic drivers (sex, age, previous breeding outcome) of variation in habitat use and trophic level; (ii) quantify variation among feathers of the same birds; and (iii) examine potential carry‐over effects of habitat use and trophic level during the non‐breeding period on subsequent breeding outcome. In agreement with previous tracking studies, δ13C values of individual feathers indicate that non‐breeding Grey‐headed Albatrosses from South Georgia foraged across a range of oceanic habitats, but mostly in subantarctic waters, between the Antarctic Polar Front and Subtropical Front. Sex differences were subtle but statistically significant, and overlap in the core isotopic niche areas was high (62%); however, males exhibited slightly lower δ13C and higher δ15N values than females, indicating that males forage at higher latitudes and at a higher trophic level. Neither age nor previous breeding outcome influenced stable isotope values, and we found no evidence of carry‐over effects of non‐breeding habitat use or trophic level on subsequent breeding outcome. Repeatability among feathers of the same individual was moderate in δ13C and low in δ15N. This cross‐sectional study demonstrates high variability in the foraging and migration strategies of this albatross population. |
author2 |
British Antarctic Survey NERC UK NERC Life Sciences Mass Spectrometry Facility Glasgow Scottish Universities Environmental Research Centre (SUERC) University of Glasgow-University of Edinburgh-University of Glasgow-University of Edinburgh-Natural Environment Research Council (NERC) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Environment and Sustainability Institute Penryn, UK University of Exeter Centre for Ecology and Conservation, Penryn Campus UK British Antarctic Survey (BAS) Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Mills, William Mcgill, Rona A.R. Cherel, Yves Votier, Stephen Phillips, Richard |
author_facet |
Mills, William Mcgill, Rona A.R. Cherel, Yves Votier, Stephen Phillips, Richard |
author_sort |
Mills, William |
title |
Stable isotopes demonstrate intraspecific variation in habitat use and trophic level of non‐breeding albatrosses |
title_short |
Stable isotopes demonstrate intraspecific variation in habitat use and trophic level of non‐breeding albatrosses |
title_full |
Stable isotopes demonstrate intraspecific variation in habitat use and trophic level of non‐breeding albatrosses |
title_fullStr |
Stable isotopes demonstrate intraspecific variation in habitat use and trophic level of non‐breeding albatrosses |
title_full_unstemmed |
Stable isotopes demonstrate intraspecific variation in habitat use and trophic level of non‐breeding albatrosses |
title_sort |
stable isotopes demonstrate intraspecific variation in habitat use and trophic level of non‐breeding albatrosses |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-02931984 https://doi.org/10.1111/ibi.12874 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
ISSN: 0019-1019 EISSN: 1474-919X Ibis https://hal.archives-ouvertes.fr/hal-02931984 Ibis, 2021, 163, pp.463-472. ⟨10.1111/ibi.12874⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/ibi.12874 hal-02931984 https://hal.archives-ouvertes.fr/hal-02931984 doi:10.1111/ibi.12874 |
op_doi |
https://doi.org/10.1111/ibi.12874 |
container_title |
Ibis |
container_volume |
163 |
container_issue |
2 |
container_start_page |
463 |
op_container_end_page |
472 |
_version_ |
1766201531241070592 |